The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/netccitt/hd_var.h

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    1 /*      $NetBSD: hd_var.h,v 1.11 2003/08/07 16:33:01 agc Exp $  */
    2 
    3 /*
    4  * Copyright (c) 1990, 1993
    5  *      The Regents of the University of California.  All rights reserved.
    6  *
    7  * This code is derived from software contributed to Berkeley by
    8  * the Laboratory for Computation Vision and the Computer Science Department
    9  * of the University of British Columbia.
   10  *
   11  * Redistribution and use in source and binary forms, with or without
   12  * modification, are permitted provided that the following conditions
   13  * are met:
   14  * 1. Redistributions of source code must retain the above copyright
   15  *    notice, this list of conditions and the following disclaimer.
   16  * 2. Redistributions in binary form must reproduce the above copyright
   17  *    notice, this list of conditions and the following disclaimer in the
   18  *    documentation and/or other materials provided with the distribution.
   19  * 3. Neither the name of the University nor the names of its contributors
   20  *    may be used to endorse or promote products derived from this software
   21  *    without specific prior written permission.
   22  *
   23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   33  * SUCH DAMAGE.
   34  *
   35  *      @(#)hd_var.h    8.1 (Berkeley) 6/10/93
   36  */
   37 
   38 /*
   39  * Copyright (c) 1984 University of British Columbia.
   40  *
   41  * This code is derived from software contributed to Berkeley by
   42  * the Laboratory for Computation Vision and the Computer Science Department
   43  * of the University of British Columbia.
   44  *
   45  * Redistribution and use in source and binary forms, with or without
   46  * modification, are permitted provided that the following conditions
   47  * are met:
   48  * 1. Redistributions of source code must retain the above copyright
   49  *    notice, this list of conditions and the following disclaimer.
   50  * 2. Redistributions in binary form must reproduce the above copyright
   51  *    notice, this list of conditions and the following disclaimer in the
   52  *    documentation and/or other materials provided with the distribution.
   53  * 3. All advertising materials mentioning features or use of this software
   54  *    must display the following acknowledgement:
   55  *      This product includes software developed by the University of
   56  *      California, Berkeley and its contributors.
   57  * 4. Neither the name of the University nor the names of its contributors
   58  *    may be used to endorse or promote products derived from this software
   59  *    without specific prior written permission.
   60  *
   61  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   62  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   63  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   64  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   65  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   66  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   67  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   68  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   69  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   70  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   71  * SUCH DAMAGE.
   72  *
   73  *      @(#)hd_var.h    8.1 (Berkeley) 6/10/93
   74  */
   75 
   76 /*
   77  *
   78  * hdlc control block
   79  *
   80  */
   81 
   82 struct  hdtxq {
   83         struct  mbuf *head;
   84         struct  mbuf *tail;
   85 };
   86 
   87 struct  hdcb {
   88         struct  hdcb *hd_next;  /* pointer to next hdlc control block */
   89         char    hd_state;       /* link state */
   90         char    hd_vs;          /* send state variable */
   91         char    hd_vr;          /* receive state variable */
   92         char    hd_lastrxnr;    /* last received N(R) */
   93         char    hd_lasttxnr;    /* last transmitted N(R) */
   94         char    hd_condition;
   95 #define TIMER_RECOVERY_CONDITION        0x01
   96 #define REJ_CONDITION                   0x02
   97 #define REMOTE_RNR_CONDITION            0X04
   98         char    hd_retxcnt;
   99         char    hd_xx;
  100         struct  hdtxq hd_txq;
  101         struct  mbuf *hd_retxq[MODULUS];
  102         char    hd_retxqi;
  103         char    hd_rrtimer;
  104         char    hd_timer;
  105 #define SET_TIMER(hdp)          hdp->hd_timer = hd_t1
  106 #define KILL_TIMER(hdp)         hdp->hd_timer = 0
  107         char    hd_dontcopy;    /* if-driver doesn't free I-frames */
  108         struct  ifnet *hd_ifp;  /* device's network visible interface */
  109         struct  ifaddr *hd_ifa; /* device's X.25 network address */
  110         struct  x25config *hd_xcp;
  111         caddr_t hd_pkp;         /* Level III junk */
  112         int     (*hd_output)    /* separate entry for HDLC direct output */
  113                         __P((struct mbuf *, ...));
  114 
  115         /* link statistics */
  116 
  117         long    hd_iframes_in;
  118         long    hd_iframes_out;
  119         long    hd_rrs_in;
  120         long    hd_rrs_out;
  121         short   hd_rejs_in;
  122         short   hd_rejs_out;
  123         long    hd_window_condition;
  124         short   hd_invalid_ns;
  125         short   hd_invalid_nr;
  126         short   hd_timeouts;
  127         short   hd_resets;
  128         short   hd_unknown;
  129         short   hd_frmrs_in;
  130         short   hd_frmrs_out;
  131         short   hd_rnrs_in;
  132         short   hd_rnrs_out;
  133 };
  134 
  135 #ifdef _KERNEL
  136 extern struct   hdcb *hdcbhead;         /* head of linked list of hdcb's */
  137 extern struct   Frmr_frame hd_frmr;     /* rejected frame diagnostic info */
  138 extern struct   ifqueue hdintrq;        /* hdlc packet input queue */
  139 struct  Hdlc_frame;
  140 struct  Hdlc_iframe;
  141 struct  Hdlc_sframe;
  142 
  143 extern int      hd_t1;                  /* timer T1 value */
  144 extern int      hd_t3;                  /* RR send timer */
  145 extern int      hd_n2;                  /* frame retransmission limit */
  146 
  147 
  148 /* hd_debug.c */
  149 void hd_trace __P((struct hdcb *, int , struct mbuf *));
  150 int hd_dumptrace __P((struct hdcb *));
  151 
  152 /* hd_input.c */
  153 void hdintr __P((void));
  154 int process_rxframe __P((struct hdcb *, struct mbuf *));
  155 int process_iframe __P((struct hdcb *, struct mbuf *, struct Hdlc_iframe *));
  156 bool range_check __P((int, int , int ));
  157 void process_sframe __P((struct hdcb *, struct Hdlc_sframe *, int));
  158 bool valid_nr __P((struct hdcb *, int , int));
  159 
  160 /* hd_output.c */
  161 int hd_output __P((struct mbuf *, ...));
  162 void hd_start __P((struct hdcb *));
  163 void hd_send_iframe __P((struct hdcb *, struct mbuf *, int));
  164 int hd_ifoutput __P((struct mbuf *, ...));
  165 void hd_resend_iframe __P((struct hdcb *));
  166 
  167 /* hd_subr.c */
  168 void hd_init __P((void));
  169 void *hd_ctlinput __P((int , struct sockaddr *, void *));
  170 void hd_initvars __P((struct hdcb *));
  171 int hd_decode __P((struct hdcb *, struct Hdlc_frame *));
  172 void hd_writeinternal __P((struct hdcb *, int, int ));
  173 void hd_append __P((struct hdtxq *, struct mbuf *));
  174 void hd_flush __P((struct ifnet *));
  175 void hd_message __P((struct hdcb *, char *));
  176 int hd_status __P((struct hdcb *));
  177 struct mbuf *hd_remove __P((struct hdtxq *));
  178 
  179 /* hd_timer.c */
  180 void hd_timer __P((void));
  181 
  182 #endif

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